Heating boiler



June 24, 1930. H. ADDAMS 1,765,357

HEATING BOILER iled Wm. 19- 1927 INVENTOR ATTORNEY Patenteciqlune 24,1939 v STATES? f noivrnaannaiusg on 'oswne ojivnw YORK V f I 1,765,852 I H ATING'BOIL R Application 'filedllovelnber 1a, 1927. S .eria1 No.234,321'.

. This invention relates to, boilers in genwith; the space necessary for perfectcombustion, the necessarily large space so required with? the'] expedients heretofore practiced, made such fired boilers objectionable espe-- cially. for use-in buildings. where space was t 'the lower cylindrical chamber to pass scarce, unobtainable'or' very Ivaluable.

The present inventlon alms to prov de a firebox or'furnace whereby, fuel such as pow- 'deredcoahoil' and gas under pressure" can -with.l;facility be used aiidza minimum' space requiredfo r the fire-box or furnace; 00H]: I'nensurate with perfect TCOIIlbLlStlOIl. j

' Toithis end, the present,inventionaiins to providea fire-box or furnace which will cooperate with the burneror discharge nozzle of'thefuel such as powdered icoal, oil and gas underpressure to causethe-fuel and resultant fi'ame'to move at a great velocity 1n a:'gyra torypathjof movement,whereby the. fuel and flamewill remain in .thefire-box orfurnace a-considerably longerqtime than as compared to fuelijwhich is passingthrough thefire-box orffurnace inTstraight; linesf,"-and' thus permit', the.- format-ion ofa. smaller ffi're-box or 0 furnace with a given res'ult asjcoinparedlto'a 14..

fire-bOXJOn'furnaCe where the fuel and flame pass in straight line pathsjof movement. From, theforegoing it will be seen that it. is not an aim of the inventionm-erely to delay the passage of the fuelandflamej outof the firebox-or furnace buttofacilitate therapid passage of the. fuel and; flame through an extended path' of movement in; fire-box or furnace of agiven areato facilitatethe'thor- -ough combustion of the fuelbefore the flame p ses n th flu Pi Specifically, the present invention aims to I provide afire-box or furnace having a'vertically extending cylindrical wall cooperating 'with a burner or fuel discharge nozzle to cause the'fuel and resulting flame to move through gyratory paths of movement at a great velocity before discharging into the flue p1pes.-- I

Specifically, the invention further contemu platesv the provision of; a firebox or furnace having a lower vertically extending cylindrical chamber, an upper restricted I discharge passage tothe flue pipes, and a burner or fuel dischargenozzle for powdered coal, oil or gas entering. the lower cylindrical chamber whereby the restrictedpassage will cooperate 'withthe cylindrical chamber and the velocity:

of the fuel being received to cause the fuel and resultlng flame while passing through through gyratory paths of movement at great velocity before discharging into the flue pipes from the upper restrictedpassage'.

. It is a still further object ofthe present inventlon to provide a lower vertically extend 7 ing cylindrical chamber, anupper restricted} F V discharge passage to the flue pipes, and a v the burner,'-such as a rotary burner or the like, whereby the fuel under pressure discharging from the burner in a rotary direca f tion will cooperate with the vertically extending cylindrical- ,wall of the lower cylindrical chamber to cause the fuel and resulting flame to pass through gyrating paths .of movement at great velocity before discharging into the flue pipes from .said restricted passage. I ,It is a still further object of the present invention toprovide a boiler having an extended cylindrical'water jacket surrounding the fire-box orzfurnace, which water jacket is in communication with the water in the main section of the boller surrounding the flue pipes, whereby the maximum of heating surface for the boiler is provided foragiven space and areaof boiler; g These and other features, capab1l1t1es and advantages of the present invention will' appear from the subjoined detailed descr1pt1on oflspecific embodiments thereof, illustrated I V v forming a part of the main water supply to in the accompanying drawings, in which Figure l'is a longitudinal sectionof a boiler having a rotatable burner located in the cenl ter of the base of the fire-box or furnace;

- Fig. 2 is-a' section'on the line 2-2 of Fig. 1.

In the embodiment illustrated in Fig. 1, there is illustrated a vertically extending cy lindrical portion A'sup'po'rte'd ona base B, and a horizontally extending cylindrical portion C extending'rear'wardly from the portionA and supported by'the standard 51 at its rear end. The rear end of the portlQIl-C is provided with a chimney extension'21 The'fire-box or furnace is formed;

inthe portion Aby means of thelower cylindrical inner wall 3 secured to the base B, the front wallof'which extends up to apoint just below the water level i and continues rearwardly by means of' the arc-' shaped portion 5V to the rearward down- 7 1 wardly extending portion 6connecting with thehorizontally extending'portion 7 just about at the lower level o fithe portion C to communicate with the downwardly extending portion 80f thecylindrical'wall 3 adj acent to and concentric with but Separated from the outer shell-9. The outershell 9 g 7 extends into the shell lO-of the portion Q, the outer shell 9 forming the outer cylindrical shell of theportion A, and is spaced from fthe inner shell of the fire-box or furnace to the usual way. v r From the foregoing it will thus be seen that the lower portion of the wall 3 spaced f from'the outer wall 9 of the'vlertically' ex- 1 tending portion A,'forms' with the second wall, composed of the offset portions 6 and 7 and the upper portion ofthe wall 3, an 7 extended radiant heat exchanging furnace surface.

- 1 as illustrated,"theflinner shell'of the ows portion L is considerably extended as com-' pared to the usual fire-box of'this typeherev tofore in use, and'forms with the remaining .inner shell of the fire-box, substantially twenty per cent'vof the heating surface or heat 'exchanging 's urface .of the, boiler' as compared to approximately ten per cent of the heating surface or heat exchanging surgace o'fa boiler 'used inathe practice with or- V na'ry coal fired boilers, thus doubling the hlgh temperature surface of the boiler which is exposed to radiantheat. Furthermore, the'elongated skirt or vertically extending cylindrical water jacket formed by the walls 8' and 9 for the'fire boX chamber L serves to reduce the heat lossto a minimum, the water in such extended skirt be heated taking up the heat, whereby-the heat transmitted to the walls of the fire j chamber will be used to heat the water. to

be heated and thus prevent loss of the same. Byrmeans of this water jacket,furthern1ore,

leakage of the furnace structure may be igcnoredsince' 'there'will of course be, no interconnected sections for thefire-box wall and The fuel discharging into the j'fi're-box chamber L'is preferably initially deflectedor given an initial rotary movementto be con-" tinued when engaging the cylindrical wall 8, and thereby intensified; Forthis purpose there is preferably provided a burner. or a fuel, discharge'nozzle which causes a rotary movement to be imparted to the fuel as it leaves I in the present instance,*a rotatable burner or fuel discharge nozzle 14 which is located in the center of the basepartition 'l3 between the burner. To this end, there is illustrated" the supporting base Band 'th'e fire-box-L,

which isconnectedbyac'onduit 15 to asuito able supply of fuel such as powdered coal,

oil or gas and the air pressure in the usual way.

' As the fuel-underpressureisdischarged into the lower chamber L in a rotary direction, as indicated by the arrows: 16, it I cooperates with the'innercylindrical wall 3 to continue in a gyratory' cyclonic action, as indicated by the. arrows 17, to pass in an upwardly moving cyclonic directiomthat is,-

through an upwardly extending cyclonic passage of movement into the restricted chamber U where its whirling action is con- 'llll'lllOCl' until it enters and discharges through the tube sheet 6 into the flue pipes 12 {Due tethe vertically extending cylindrical form v of "the lower chamber L and the. upwarddraft through the chamber U, the speed or velocity of the fuel andnresulting flame as "it leaves the nozzle is increased so that while momentarily delayed; inthe '-lower chamber L, the fuel and flame :is moving. at a tremen dous' velocity in a cyclonic path on its way clonic spiral action, it ofcourse is constantly being subjected to a violentturbulent, agitation due to the constant expansion' s that are taking place inthe [moving masses as combustion proceeds.

ductive heat exchanging furnace surfaces de lined by the flue pipes are arranged tocooperate with horizontally extending flowages the walls of the fireboxportions Li and U to the restricted passage U. While thefu'eli-in I and resulting flame pass through this fey of heat transferring gases, whiletheradiant i heat exchanging furnace surfaces defined by are arranged to cooperate with gases and products of combustion that are moving in cyclonic circuitous paths of movement that spiral upwardly from the fuel inlet to discharge from the restricted portionU into the flue pipes 12. From this itwill be seen that the radiant heat exchanging surfaces are exclusively composed of flowage deflecting walls, whereby the intenselyhot gases generated in the fire-box portions are constantly caused to slip along the walls of the fire-box portions. In this way, extended radiant heat exchanging furnace surfaces are provided, and at the same time, due tothis slippage producing arrangement, suchsurfaces are in no danger of injury from straight line flames, and furthermore a minimum fire-box area or space provided to aflord a maximum move ment of the fuel and resulting flame, so necessary to eifect'perfect'combustion. r

7 It is obvious that various changes and modifications may be made. to the details of construction without departing from the gem eral spirit of'the inventionas set forth in the appended claim.

Iclaim: t

In a boiler, the combination of a vertical combustion chamber cylindrical throughout the major portion of its height and terminating in an extension of restricted cross-sectional area offset from one side of the longitudinal axis of said major cylindrical portion, a Vertical shell spaced from the combustion chamber and surrounding the same to provide a water chamber, a horizontal shell intersecting the vertical outer shell in'the plane of the offset part and on the side of said outer'vertical shell opposite said oflset part, the inner Vertical wall of said offset portion constituting a flue sheet, smoke tubes connected tosaid flue sheet and extending longitudinally of said horizontal shell to communicate with an outlet for the gases, and a mechanical rotatable burner positioned centrally of the base of said combustion chamber to discharge its fuel upwards in a spiral pat t V V HOMER ADDAMS, 

